Comp, you probably remember the ASA Power Point presentation that covered all the ins and outs of this new rule from last year. Yes, it was very confusing!
Toward the end of the season, ASA cleaned up some of the interpretations. The new interpretations were published on their website under "Plays and Clarifications". They simplifies things a bit, treating the "extra" batters more like EP's (similar to the slow pitch "extra players" rule). They also changed how courtesy runners and subs would be handled.
But to directly answer the question...yes, as of last year ASA does now allow you to bat the entire roster in pool play only.